The total number of cards is:
2 + 3 + 7 = 12 cards
We want probability of blue OR yellow card. Remember, "OR" means "+" and "AND" means "x".
Blue cards = 2
Yellow cards = 7
Thus,
Total blue OR yellow = 2 + 7 = 9
So, we can say that the probability that a card is blue or yellow is:
9/12
Or,
3/4
The correct answer is: